PVC Cable

What is a PVC cable?

PVC cables are lines for power or data which are equipped with a protective insulation made from polyvinyl chloride (PVC). They are offered in a vast majority and are characterized by their being water proof and their low price. It has to be taken into account though that PVC is a halogen. Halogens (or salt formers) are connections of chlorine, fluorine, bromine, iodine and astatine. Cables containing halogen are dangerously inflammable. They create a lot of smoke, carry the flame along the entire cable and release toxic fumes. The use of halogen-free cables is mandatory almost everywhere for fixed installations in buildings. 

PVC Cable Temperature Resistance

The highest allowed permanent stress for PVC cables is 70 °C. Thicker cables without cooling can already reach this temperature during normal room temperature and medium load. Above this temperature, PVC tends to get soft. If the cable stays above this temperature for a longer period of time, it will melt and open up the power line.

Another danger is presented by temperatures which are too low. From -5 °C PVC starts to strongly brittle and it starts to harden. The lower the temperature, the stronger these effects appear. If the cable is then moved or bent, tears may appear in the coat. This allows water to enter and create a shortage which may lead to a fire.